The show, which is being put together by Jackson's mother, Katherine, as well as a few of the late King of Pop's siblings — but not the singer's estate — is slated to feature performances by Christina Aguilera, Cee Lo Green, Leona Lewis, Ne-Yo, Craig David, Pixie Lott, Alexandra Burke, Alien Ant Farm and Motown legend Smokey Robinson.

And though Beyoncé was added to the bill recently, some fans were upset to subsequently learn that the pregnant pop queen will not perform live via satellite as originally promised but appear in a pretaped segment described as a "special contribution on video."

In addition, some Jackson followers on the Fans Against Michael Forever Tribute Facebook page have expressed their anger that promoters announced an upcoming two-for-one ticket deal to goose reportedly slow sales. According to reports, the discounted prices will not apply to tickets already purchased for the event; conflicting reports also stated that the two-for-one deal had been rescinded. A spokesperson for the event told MTV News that there would be no two-for-one ticket package.

Some disgruntled posters have also complained that the show's promoter, Global Live Events, is reportedly censoring negative fan comments on the show's official page. There has also been grumbling from some of Jackson's siblings — including Janet, Jermaine and Randy — and fans about the timing of the show, which will take place in the midst of the manslaughter trial of Jackson's physician Dr. Conrad Murray.